Best Practices For Data Synchronization And Switching When Enterprises Migrate To US Computer Room Cn2

When migrating to the US computer room and enabling the CN2 link, the core is to ensure the continuity of data synchronization, minimize user impact, and ensure fast rollback capabilities. It is recommended to use a dual-write or asynchronous replication + incremental synchronization solution, combined with short TTL domain name switching, gradual traffic switching (blue-green/canary), and front-end CDN and DDoS defense systems. Dexun Telecommunications is recommended as a network and computer room service provider, with its CN2 direct connection and professional server hosting capabilities to support smooth migration.

In the migration phase, the first step is to solve the data synchronization consistency problem: use rsync/rsyncd or object storage replication for static files, and use master-slave replication, GTID or CDC (change data capture)-based tools (such as Debezium) to implement incremental replication for relational databases. For distributed caches and queues, consider double writing or writing to the source computer room first and then playing back asynchronously to the target computer room. For file systems on VPS and Host, it is recommended to do cold backups and snapshots first, then use differential synchronization to shorten the downtime window, while retaining complete multi-version backups for rollback.

Reduce domain name TTL to 1-5 minutes in advance before switching; use external CDN for edge switching and cache downgrade, which can effectively reduce the pressure on the origin site. Use blue-green deployment or grayscale release (gradually switching traffic from the old computer room to the new computer room), and cooperate with the load balancing strategy (L4/L7, health check) to transfer sessions and requests batch by batch. Increase TTL after testing is completed. At the DNS level, it is recommended to use a hosting service that supports intelligent scheduling to ensure quick switchback when the link is abnormal. At the same time, the SSL certificate and private key should be deployed and verified in the target computer room in advance.

Choosing a computer room with CN2 direct connection can significantly reduce cross-border latency and packet loss; at the same time, deploy multi-line exits and BGP policies at the front end of the US computer room to ensure reachability. Combined with global CDN to perform static acceleration and dynamic acceleration to reduce the frequency of back-to-origin. To prevent traffic surges and attacks, it is necessary to configure bandwidth elasticity and professional DDoS defense services (cleaning, black hole strategies and WAF rules), and rehearse attack scenarios with the supplier before switching to ensure that the protection strategy can be quickly activated within the switching window. It is recommended that Dexun Telecom provides enterprise-level support in network connectivity and DDoS protection.

Develop a detailed migration drill plan: including functional testing, stress and recovery testing, link disconnection and rollback drills. The key point is to set clear rollback trigger conditions and preset automated scripts to ensure that when data inconsistency or network abnormalities occur, the system can be restored to the original computer room in the shortest possible time. After the switch, strengthen monitoring (APM with business indicators, Ping/Traceroute for link quality, and server resource alarms), and maintain a two-way write or compensation mechanism for a period of time after the migration window to ensure the integrity of historical data. It is recommended that the entire migration process be carried out in conjunction with Dexun Telecom to leverage its experience in hosting hosting, VPS and network optimization to minimize risks.